berger



May 30, 1933. J. BERGER SEWING MACHINE FOR FORMING CROSSED ZIGZAG STITCHES Filed June 26, 1929 8 Sheets-Sheet 1 ..nnullllllllll- IIHIIIIl/I/I/I/I/l/I/I/I/ J. BERGER SEWING MACHINE FOR FORMING CROSSED ZIGZAG STITCHES Filed June 26, 1929 8 Sheets-Sheet 2 Q IIIII /I/I //M Q 6 I! .u w Q Q i Q w U x May 30,1933. ER 1,911,668

SEWING MACHINE FOR FORMING CROSSED ZIGZAG STITCHES Filed June 26, 1929 8 Sheets-Sheet 3 y 30, 1933. J. BERGER 1,911,668

SEWING MACHINE FOR FORMING CRQSSED ZIGZAG STITCHES Filed June 26, 1929 8 Sheets-Sheet 4 J. BERGER May 30, 1933.

' SEWING MACHINE FOR FORMING CROSSED ZIGZAG STITCHES Filed June .26, 1929 8 Sheets-Sheet 5 J. BERGER 1,911,668

SEWING MACHINE FOR FORMING CROSSED ZIGZAG STITCHES May 30, 1933.

Filed June 26, 1929 8 Sheets-Sheet 6 QN QM May 30, 1933. ER- E 1,911,668

SEWING MACHINE FOR FORMING CROSSED ZIGZAG STITCHES Filed June' 26 1929 8 Sheets-Sheet 7 J. BERGER May 30, 1933.

SEWING MACHINE FOR FORMING CROSSED ZIGZAG STITCHES Filed June 26 1929 8 Sheets-Sheet 8 wherein the swinging gate having abodily- Patented May 30, 1933 UNITED STATES PATENT "OFFICE JOSEPH BERGER, OF UTICA, NEWYORK, ASSIGNOR T0 UNION SPECIAL'MACHINE COM- PANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF- ILLINOIS SEWING MACHINE FOR FORMING CRQSSED ZIGZA G STITCHfES Application filed June 26,

The invention relates to new and useful improvements in sewing machines and more particularly to a sewing machine for forming crossed zigzag stitches.

An object of the invention is to provide a -machine of the above typewherein the needles are set abreast and are moved between consecutive stitch formations so as to exchange places with each other by the aid of swinging gates in which the needle bars carrying the respective needles aremounted.

A further object of the invention isto provide a machine of the above type wherein one of the needle bars is mounted on a swinging gate moving about a fixed axis while the other needle bar is mounted in an auxiliary swinging gate pivoted for oscillation in a direction substantially at right angles to the swinging movement of the first-- to swing about'the fixed axis on which th first'swinging gate oscillates. 1

A still further object of the invention is toprovide a machine of the above type movement is oscillated by toggle devices moving across a center line so that said gate is oscillated twice for each oscillation imparted to the other swinging gates.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the invention: V

Fig. 1 is a front view of a sewing machine embodying the improvements.

Fig. 2 is a rear view of the same.

Fig. 3 is a. view of the machine from the front end thereof. 7

Fig. f is a sectional view on the line 4-4 of Fig. 1.

Fig. 5 is a sectional view onthe line 5-5 ofFig. 1. r

192$. Serial No. 373,759.

Fig. 7, is a detail in horizontal section showing the bodily shiftable swinging gate,

the needle bar carried thereby and the means for operating said needle bar.

Fig. 8 is a View showing diagrammatically the position of the needles and the path of the needles as they change places with each other between consecutive stitches. Fig. 9 is a similar view showing thepath of movement of the needles as they changc places between thenext succeeding consecutive stitches. I I 7 I Fig. 10 is a plan view on an enlarged scale showing diagrammatically the crossed zigzag stitches. I Fig. 11 is a detail partly in section and partly broken away showing the position of the cams when the swinging gates are at a dwell and the needle is reciprocating at one lateral extreme position.

Fig. 12 is a similar view showing the'position of the cams when the needle gates are at their other extreme position. The invention is directed to a sewing machine for forming crossed" zigzag stitches.

In Fig. 10 the stitch formed on the machine is indicated diagrammatically. In this view;

the fabric is indicated at 1 and the two needle threads are indicated at n and n.

The direction of feed is indicated by the arrow. The needle carrying the [needle thread 11, enters'the fabric at a, while the needle carrying the needle thread at enters the fabric at b. The fabric is then fed for the next stitch formation and between these consecutive stitches the needles change places with eachother, and the needle carrying the needle thread it entersthe fabricatthe point a, while the needle carrying the needle thread n enters the fabric at b. The fab: ric is again moved another step and the needles enter the fabric at'the points m and b respectively. After the next feeding movement the needles enter the fabric at the points a and]; respectively, and so on.

It will thus be seen that there are two lines of zigzag stitches formed in which the needles change places between consecutive stitches and cross the zigzagstitches.

The needle carrying the needle thread n is indicated at2 in the drawings, while the needle carryingthe needle thread n is indicated at 3 in the drawings. As clearly shown in Fig. 8, the needle 2 moves in the the path indicated by the arrow (5 to the other extreme of its lateral movement. In order to accomplish this movement of the needles, the needle bar carrying the needle 2 is mounted in a swinging gate pivoted to swing about a fixed vertical axis at the rear side of the needle head. This gate is oscillated so as to move the reciprocating position of the needle bar from one lateral ex treme position to the, other lateral extreme position. The needle bar carrying the needle 3 is mounted inan oscillating gate which moves the needle bar in a direction substantially at right angles to the path of lateral movement of the needle 2. This swinging gate carrying theneedle 3 is in turn pivoted on a swlngmg gate which,

moves in a manner similar to the swinging gate carrying the needle 2 and about the same vertical axis.

By this arrangement the needle bars are. caused to shift so that the needles will. change places with each other;.the needle 2 moving directlyv across from one position to the other, while the needle 3 'move's out around the needle 2 to its treme of. movement. 2 y

Referring more in detailto the drawings which show one embodiment ofthe invention, the machine includes a supporting bed 4 carrying a work support 5. A standard 6 is mounted on the supporting bed and is provided with an overhanging arm 7 at' the outer] end of which is the needle head 8. Theneedle 3 is carried by a needle bar 9 andthe needlebar 9 is mounted for reciprocation in a swinging gatelO. This "swinging gate 10 is in turn pivoted to swing about a vertical axis 11 at the free end of a swing ing gate 12 (see Fig.6). The swinging gate 12 is mounted to swing about a vertical axis 13 at the rear of the needle head. Said swinging gate 12 is mounted for free swinging movement on a rod 14*. At the. lower end of the needle bar 9 is a collar 15 carrying a laterally projecting arm 16. The

other lateral ex- 2 needle 3 has its shank 17 bent at right angles to the length of the needle and this shank is mounted in the laterally projecting arm 16.

The needle 2is carried by a. needle bar 18. This needle bar 18is mounted for reciprocation in a swinging gate 19. The swinging gate 19 is mounted for free movement on this same rod 14 .at the rear of the needlehead The material is held on the work support by a presser foot 20 carried by a presser bar 21. Projecting laterally from the ,presser bar 21 is a forked arm 22. The lower end of therod 14 is cutaway at itssides so as to provide parallel faces and this portion of the rod lies in the forked end of the a rm 22. preventing the This serves as a means for rod 14 from oscillation.

The needle bar 18 is reciprocated by a needle lever 23 which is pivoted at. 24 to the standard 6. Said needle lever is connected by a link 25 to a lug 26 carried by the, needle bar 18 (see Fig. 6). iThe lug 26 is mounted on a sleeve 27 which is fixed to the needle bar. Thus it is that the needlel bar 18 is reciprocated in its swinging gate....This link connection between the. needle lever and the needle bar is substantially vertical and will permit the oscillations of the gate and the shifting of the needle bar from one lateralposition to the other..- v

Projecting from the sleeve 27 is a lug 29. Mounted on the needle bar 9 is a sleeve 30. This sleeve has a rearwardly projecting arm 31 provided with spaced members which receive therebetween the lug 29. The arm.31 is provided with a vertical recessed portion 32 which engages'a projecting plate 33.0n the swinging gate 10.} This prevents the needlebar 9 from oscillating aboutits axis. The arm 31 can slidevup and downon the plate 33. The plate 33 is a part of the swing: ing gate 10. r

The needle bar reciprocates in the sleeves 34, 34 which are also carried by the swinging gate 10. These sleeves in their fixed relation to the swinging gate 10 hold the needle barin a fixed lateral position on said swinging gate 10 while the connection between the sleeve 30 on the needle bar 9. and the project ing lug 29 causes the needle bar to recipro cate vertically in the sleeves 34, 34. It is through this structure that both needle bars are simultaneously reciprocatedby the needle lever 23. The needle lever 23 is oscillated by an eccentric strap 35 cooperating with an eccentric onthe main shaft 36. The swinging gate 12 onwhich the swinging gate 101is mounted for. bodily movement is oscillated by means of an arm 37 carried by a, sleeve 38 which is fixed to a shaft 39... This shaftis mounted in bearings 40 and 41 carried respect ively by the standard andoverhanging arm. A link 42 is connected to a ball stud 43 attached to .the lower end, of the arm 37 and also to a ball stud 44 attached to the swinging gate 12.

The gatelO is mounted on a rod 45 which forms the axis 11 on which said gate oscillates. The rod 45 is at the outer or free end of the gate 12 which swings about the axis cation in the. swinging gate 19, as above noted. This gate oscillates about the axis 13 which is the same axis on'which the swinging gate 12 oscillates. Fixed to this swinging gate 19 is a laterally projecting arm 46. V This laterally projecting arm 46 carries a ball stud 47. A link 48 connected to said ball stud is in turn connected to a ball stud at the lower end ofan arm 49 which is formed integral with a collar 50 and the collar 50 is clamped to the shaft 39.

As the shaft 39 oscillates it will swing the arm 46 which in turn will swing the gate 19. It will be noted that the arm 46 projects from the opposite side of the axis of' support for the gate 19 from the mounting of the needle bar therein while the connection between the arm 37 and the swinging gate 12 is at the same side of the axis as the mounting for the swinging gate 10 which carries the needle bar 9. As a, result, when the shaft 39 oscillates, it will move the swinging gate 12 in one direction and the swinging gate 19 in the opposite direction on the pivotal axis 13.

The shaft 39 is oscillated by means of an arm 51. Said arm carries a ball stud 52 to which a link 53 is attached. This link 53 at its other end is connected to a ball stud in a bearing in the standard 6. This gear. 61 mesheswith a gear 62 on the main shaft 36. The gear 61 is of such dimensions as to rotate once for each two. rotations of the The cam 59 is shaped so as to give a dwell to the oscillations in the shaft 39 so that the swinging gates are oscillated and then come to a dwell while holding the needle bar in a fixed position while it is reciprocating for puncturing the fabric and forming stitch. After the needles are well above the fabric, then the swinging gates are moved for the positioning of the needle bars for the next stitch formation. V

The swinging gate 10 is oscillated on its support by a. sleeve 63. This sleeve is mounted for free movement on the shaft 39. Fixed to the sleeve is an arm 64. A link 65 isv connected to a ball stud 66 at the lower end of the arm 64'. Thislink is connected at its other end, to a ball stud 67 at the lower end of an arm 68 carried by a sleeve 69 fixed to a rock shaft 70. This .rockshaft 70 is mounted foroscillation in a bearing. 71 which is fixed to the needle head and head. This back and forth movement of the.

sleeve 74 will swing the gate 10 on its axis 11. tion toward and from; the needle head and in a path which is substantially at right angles to the path of movement of the needle bar 18 as the gate 19 moves it from one lateral extreme position to the other.

The sleeve 63 on the shaft 39 is given a complete oscillation for each single oscillation of the shaft 39. hen the shaft 39.

moves in one direction the gates12and 19 are swung on the pivotal axis 13. Asnoted ab0ve,the shaft 39 is moved in one direction and then given a dwell. 'During this swinging movement of the gate which moves the needle bar 18 from onelateral extreme position to the other lateral extreme, the gate 10 isswung away from the needle head and at the same time the gate12'in' which it is mounted moves so as to shift the gate 10 bodily. Y I

Thegate 10 is moved back again toward the needle head while the gate 12 is making its lateral movement. As a result the needle 1 3 carr ed by the needle bar 9 takes the curved;

path. of travel practically moving around the needle 2 as shown in Figs. 8 and 9.

The sleeve 63 receives its oscillations from an arm 77. This arm 77 is fixed to the sleeve 63 and carries a pivot pin 78 to which a link 79 is attached. The link 79 at its other end is pivoted to a pivot pin 80 carried by a lever 81. The lever 81 is pivoted at 82a to a bracket 83 carried by the bed 4.. The lever is provided with. spaced plates which cooperate with a cam 82 mounted on the This moves the needle bar 9 in a directhe stub shaft carrying the cam 59. The cam 82 is so shaped as to oscillate the lever to the left and to the right of the position shown in Fig. 5. It is also so shaped that when the lever is swung to its extreme at the right it will remain at a dwell at this point and when it is swung to the extreme movement to the left, it likewise remains at a dwell. The lever and the link 79 perform a toggle action which gives to the sleeve 63 two oscillations with a dwell at each end of the oscillations during one oscillation of the shaft 39 and both the sleeve and the shaft receive their oscillations from the one stub shaft which is driven at onehalf the speed of the main shaft.

' These movements are so combined that the following operation takes place: The needle 2 carried by the needle bar 18 enters the fabric at one lateral extreme position, while the needle 3 carried by the needle bar 9 enters the fabric at the other lateral eX- treme position. The needles are moved into and out of the fabric by the same needle bar reciprocating means. After the needles are withdrawn from the fabric, then it is that the swinging gates are operated. This oc curs while the needles are above the fabric and the swinging gates mounted to move about the axis 13 are given a movement in one direction for each complete reciprocation of the needle bars. This positions the needle bars at their extreme lateral movements and maintains them at this position gate swings, but also rearwardly, moving out and back, completing an oscillation for each oscillation of the main swinging gate 12 on which it is mounted. This causes the needle to move in the curved path indicated in Figs. 8 and 9.

Thus it is that by swinging gates the needles are caused to change places between consecutive stitches. From the above it will be apparent that the needle bars are moved laterally and caused to change places with' each other through a means whereby-the lateral movements imparted tothe bars may be simultaneously adjusted, as the swinging gates which move the needle bars laterally are both operated from the same shaft, and the extent of oscillation given the shaft may ibe varied. This insures that the lateral shift given the needle bars when varied shall be symmetrically disposed relative to the line of feed.

Cooperating with the needles beneath the work support is a thread carrying looper 84. This looper cooperates with both needles for the reason that when the needles enter the fabric they enter the fabric abreast. A loop retainer 85 cooperates in holding the loops well back on the looper so that both needles will enter the looper thread triangle.

-This looper mechanism is of the usual construction and detailed description there of is not thought necessary.

The material is fed across the work support by a feed dog 86 which cooperates with the presser foot 20. This feed dog is a part of the ordinary four-motion feeding mechanism and detailed description thereof is not thought necessary.

From the above it will be apparent that I have provided a sewing machine for forming crossed zigzag stitches wherein the needle bars are positively reciprocated and positively shifted by swinging gates so that the needles are caused to change places with each other between consecutive stitches. It is obvious that the crossed zigzag stitches formed on this machine may be applied in any desired way to a fabric either at the edge of the fabric or within the limits of the fabric. 7

It is also obvious that minor changes-in the details of construction and the arrangement of the parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is V i l. A sewing machine including a work support, a feeding mechanism, needles arranged abreast, a needle bar for each needle, swinging gates for supporting said needle bars, and means for operating-said gates whereby said needles are caused to move laterally and change places with each'other be.

tween stitches and crossed zigzag stitches formed, said means including devices whereby the lateral movements imparted to the needle bars may be simultaneously varied.

2. A sewing machine including a work support, a feeding mechanism, needles arranged abreast, a needle bar for each needle,

a swinging gate forone of said needlebars pivoted in rear of the stitching point for moving the needle bar laterally of the line of feed, a swinging gate for the other needle bar pivoted at one side of the line 'of feed ranged abreast, a needle bar for each needle, a swinging gate for one of said needle bars pivoted in rear of the stitching point for moving the needle bar laterally of the line of feed, a swinging gate for the other needle bar pivoted at one side of the line of feed for moving the needle bar back and forth in the line of feed, a third swinging gate on which said second swinging gate is pivotally mounted, and means for oscillating said third swinging gate for moving the second swinging gate bodily laterally whereby said needles are caused to change places with each other between stitches and crossed zigzag stitches formed.

l. A sewing machine including a work support, a feeding mechanism, needles arranged abreast, a needle bar for each needle, a swinging gate for one of said needle bars pivoted in rear of the stitching point for moving the needle bar laterally of the line of feed, a swinging gate for the other needle bar pivoted at one side of the line of feed for moving the needle bar back and forth in the line of feed, a third swinging gate on which said second swinging gate is pivotally mounted, means for oscillating said third swinging gate for moving the second swinging gate bodily laterally whereby said needles are caused to change places with each other between stitches and crossed zigzag stitches formed, means for oscillating said first and last-named swinging gates in unison but in opposite directions, said means for oscillating said second swinging gate including devices for giving to said gate a back and forth movement, while the other swinging gates are moving in one direction.

5. A sewing machine including a work support, a feeding mechanism, needles arranged abreast, a needle bar for each needle, a swinging gate for one of said needle bars pivoted in rear of the stitching point for moving the needle bar laterally of the line of feed, a swinging gate for the other needle bar pivoted at one side of the line of feed for moving the needle bar back and forth in the line of feed, a third swinging gate on which said second swinging gate is pivotally mounted, means for oscillating said third swinging gate for moving the second swinging gate bodily laterally whereby said needles are caused to change places with each other between stitches and crossed zigzag stitches formed, means for oscillating said first and last-named swinging gates in unison but in opposite directions, said means for oscillating said second swinging gate including an oscillating lever and a link movable into alignment and to a position at each side of said alignment for imparting a back and forth movement to the second swinging gate, while the other swinging gates are moving in one direction.

6. A sewing machine including a work support, a feeding mechanism, a needle, a needle bar carrying said needle, a swmgmg gate in whichsaid needle bar is mounted for reciprocation, a second swmgl'ng gate pivoted in-rear of the needle and on which said first-named swinging gate is pivotally mounted, means for oscillating said second- ,named swinging gate, and means for 05011- lating the first-named swinging gate on said second swinging gate,

intoflalignment and to eachside of alignment whereby said first swinging gate is moved back and forth, while the other swinging gate is moved in one direction.

sewing machine including a work support, a' feeding mechanism, aneedle, a needle bar carrying said needle, a swinging gate in which said needle bar is mounted for reciprocation, a second swinging gate pivoted in rear of the needle and on which said first-named swinging gate is pivotally mounted, means for oscillating said secondnamed swinging gate, and means for oscillating the first-named swinging gate on said second swinging gate, said last-named means including a shaft, a swinging lever, a'

alignment and to each side of alignment whereby said rock shaft is given two complete oscillations for each oscillation of the lever, a rock shaft connected to said secondnamed, swinging gate for oscillating the same, and means operated by said shaft for oscillating said second-named rock shaft once for each'oscillation of the lever and .for giving a dwell to said rock shaft at each end of its oscillation wherebyv said needle bar may be moved laterally and given a dwell while the needle is caused to penetrate the fabric for the stitch formation.

8. A sewing machine including in combination a work support, a feeding mechanism,

a needle, a needle bar carrying said needle,

a swinging gate in which said needle bar is mounted, and means for swinging said gate so as to move the needle back and forth in the line of feed, said means including a rock shaft, an arm carried by the rock shaft, a sleeve mounted on said arm, a rod attached to the swinging gate and freely movable in said sleeve, and means for moving said swinging gate bodily laterally of the line of feed.

9. A sewing machine including in combination a work support, a feeding mechanism, a needle, a needle bar carrying said needle, a swinging gate in which said needle bar is mounted, and means for swinging said last-named -means mcluding alev'er and a link movable said gate so as'to move the, needle back and forth in the line of feed, said means including a rock shaft, an arm carried by the rock shaft, a sleeve mounted on said arm, a rod attached to the swinging gate and freely movable in said sleeve, means for oscillating said rock shaft and giving an extended dwell thereto ateach end of its oscillation, and means for moving said swinging gate bodily laterally of the line of feed and giving a dwell thereto at each end of its movement whereby the needle bar may be set at different positions relative tothe fabric and maintained in said set position While the needle enters the fabric for the switch formation. V

In testimony whereof, I afiix my signature.

JOSEPH BERGER. 

